Powered fastener driving tool having fuel/gas mixture compressed ignition

Patent metadata

Field	Value
Publication number	US-10898995-B2
Application number	US-201815890668-A
Country	US
Kind code	B2
Filing date	Feb 7, 2018
Priority date	Feb 22, 2017
Publication date	Jan 26, 2021
Grant date	Jan 26, 2021

Abstract

Various embodiments provide a powered fastener driving tool including a spring/gas chamber configured to contain pressurized gas that causes a piston to compress a fuel/gas mixture, the mixture combusted to provide necessary levels of power for driving fasteners while using less fuel. One embodiment includes: a housing; a spring/gas chamber in the housing configured to contain pressurized gas; a dual compression/combustion chamber in the housing configured to contain a fuel/gas mixture; a gas communication channel in the housing fluidly connecting the spring/gas chamber and the dual compression/combustion chamber; a movable piston in the housing such that pressurized gas in the spring/gas chamber causes the piston to move in the housing to compress the fuel/gas mixture in the dual compression/combustion chamber; and a driving blade connected to the piston such that combustion of the compressed fuel/gas mixture causes the piston to move in the housing to cause the driving blade to drive a fastener.

First claim

The invention is claimed as follows:

1. A powered fastener driving tool comprising:
(a) a housing;
(b) a spring/gas chamber in the housing and configured to contain pressurized gas;
(c) a dual compression/combustion chamber in the housing and configured to contain a fuel/gas mixture;
(d) a gas communication channel defined within the housing and fluidly connecting the spring/gas chamber and the dual compression/combustion chamber, wherein the gas communication channel is configured to contain pressurized gas moving from the spring/gas chamber to the dual compression/combustion chamber when the piston moves from a firing position to a resting position such that the pressurized gas increases the pressure in the dual compression/combustion chamber to reduce recoil of the piston after activation of the piston;
(e) a piston movable in the housing such that pressurized gas in the spring/gas chamber causes the piston to move in the housing to compress the fuel/gas mixture in the dual compression/combustion chamber; and
(f) a driving blade connected to the piston such that the combustion of the compressed fuel/gas mixture causes the piston to move in the housing to cause the driving blade to drive a fastener.

2. The powered fastener driving tool of claim 1 , wherein the piston partially defines the spring/gas chamber.

3. The powered fastener driving tool of claim 2 , wherein a first surface of the piston defines a piston movement assistance chamber.

4. The powered fastener driving tool of claim 1 , wherein the piston partially defines the dual compression/combustion chamber.

5. The powered fastener driving tool of claim 4 , wherein a second surface of the piston defines the dual compression/combustion chamber.

6. The powered fastener driving tool of claim 1 , wherein the housing includes a gas reservoir.

7. The powered fastener driving tool of claim 6 , wherein the gas reservoir is configured to contain pressurized gas.

8. The powered fastener driving tool of claim 7 , wherein the gas reservoir is configured to release pressurized gas when the piston is moving from a resting position to one of a plurality of compression positions, such that the pressurized gas assists in moving the piston to said compression position.

9. The powered fastener driving tool of claim 7 , wherein pressurized gas can move from the spring/gas chamber to the gas reservoir when the piston is moving from one of the compression positions to a firing position to decrease the pressure in the spring/gas chamber, thereby assisting the piston in moving from said compression position to the firing position.

10. The powered fastener driving tool of claim 7 , wherein the gas reservoir is configured to release pressurized gas into the spring/gas chamber when the piston is moving from a firing position to a resting position, said pressurized gas movement assisting the piston in moving from the firing position to the resting position.

11. The powered fastener driving tool of claim 1 , wherein the housing partially supports:
(a) a pressurized gas inlet;
(b) a fuel inlet;
(c) an exhaust outlet; and
(d) a spring disposed within the housing and configured to partially support the piston in a resting position.

12. The powered fastener driving tool of claim 1 , wherein the piston includes a heel connected to and extending from a first surface, the heel configured to move pressurized gas at an angle away from an exhaust outlet.

13. A powered fastener driving tool comprising:
(a) a housing;
(b) a spring/gas chamber in the housing and configured to contain pressurized gas;
(c) a dual compression/combustion chamber in the housing and configured to contain a fuel/gas mixture;
(d) a gas communication channel in the housing and fluidly connecting the spring/gas chamber and the dual compression/combustion chamber;
(e) a piston movable in the housing such that pressurized gas in the spring/gas chamber causes the piston to move in the housing to compress the fuel/gas mixture in the dual compression/combustion chamber;
(f) a driving blade connected to the piston such that the combustion of the compressed fuel/gas mixture causes the piston to move in the housing to cause the driving blade to drive a fastener; and
(g) a gas reservoir in the housing configured to contain pressurized gas, wherein the gas reservoir is configured to release pressurized gas when the piston is moving from a resting position to one of a plurality of compression positions, such that the pressurized gas assists in moving the piston to said compression position.

14. A powered fastener driving tool comprising:
(a) a housing;
(b) a spring/gas chamber in the housing and configured to contain pressurized gas;
(c) a dual compression/combustion chamber in the housing and configured to contain a fuel/gas mixture;
(d) a gas communication channel in the housing and fluidly connecting the spring/gas chamber and the dual compression/combustion chamber;
(e) a piston movable in the housing such that pressurized gas in the spring/gas chamber causes the piston to move in the housing to compress the fuel/gas mixture in the dual compression/combustion chamber;
(f) a driving blade connected to the piston such that the combustion of the compressed fuel/gas mixture causes the piston to move in the housing to cause the driving blade to drive a fastener; and
(g) a gas reservoir in the housing configured to contain pressurized gas, wherein pressurized gas can move from the spring/gas chamber to the gas reservoir when the piston is moving from one of the compression positions to a firing position to decrease the pressure in the spring/gas chamber, thereby assisting the piston in moving from said compression position to the firing position.

15. A powered fastener driving tool comprising:
(a) a housing;
(b) a spring/gas chamber in the housing and configured to contain pressurized gas;
(c) a dual compression/combustion chamber in the housing and configured to contain a fuel/gas mixture;
(d) a gas communication channel in the housing and fluidly connecting the spring/gas chamber and the dual compression/combustion chamber;
(e) a piston movable in the housing such that pressurized gas in the spring/gas chamber causes the piston to move in the housing to compress the fuel/gas mixture in the dual compression/combustion chamber;
(f) a driving blade connected to the piston such that the combustion of the compressed fuel/gas mixture causes the piston to move in the housing to cause the driving blade to drive a fastener; and
(g) a gas reservoir in the housing configured to contain pressurized gas, wherein the gas reservoir is configured to release pressurized gas into the spring/gas chamber when the piston is moving from a firing position to a resting position, said pressurized gas movement assisting the piston in moving from the firing position to the resting position.

16. A powered fastener driving tool comprising:
(a) a housing;
(b) a spring/gas chamber in the housing and configured to contain pressurized gas;
(c) a dual compression/combustion chamber in the housing and configured to contain a fuel/gas mixture;
(d) a gas communication channel in the housing and fluidly and connecting the spring/gas chamber and the dual compression/combustion chamber, wherein the gas communication channel is configured to contain pressurized gas moving from the spring/gas chamber to the dual compression/combustion chamber when the piston moves from a firing position to a resting position, the pressurized gas increasing the pressure in the dual/compression/combustion chamber to reduce recoil of the

Assignees

• Illinois Tool Works

Inventors

• Fan Chinbay Q
• Talano Patrick

Classifications

• B25C1/04

  operated by fluid pressure {, e.g. by air pressure} · CPC title

• B25C1/08 Primary

  operated by combustion pressure · CPC title

• B25C1/008

  Safety devices · CPC title